diff --git a/PyMca5/PyMcaGui/plotting/McaROIWidget.py b/PyMca5/PyMcaGui/plotting/McaROIWidget.py
index d3f7ca90d..39198addd 100644
--- a/PyMca5/PyMcaGui/plotting/McaROIWidget.py
+++ b/PyMca5/PyMcaGui/plotting/McaROIWidget.py
@@ -1,5 +1,5 @@
 #/*##########################################################################
-# Copyright (C) 2004-2023 European Synchrotron Radiation Facility
+# Copyright (C) 2004-2024 European Synchrotron Radiation Facility
 #
 # This file is part of the PyMca X-ray Fluorescence Toolkit developed at
 # the ESRF.
@@ -337,7 +337,11 @@ def __init__(self, *args,**kw):
     def build(self):
         self.fillFromROIDict(roilist=self.roilist,roidict=self.roidict)
 
-    def fillFromROIDict(self,roilist=[],roidict={},currentroi=None):
+    def fillFromROIDict(self, roilist=None, roidict=None, currentroi=None):
+        if roilist is None:
+            roilist = []
+        if roidict is None:
+            roidict = {}
         self.building = True
         line0  = 0
         self.roilist = []
diff --git a/PyMca5/PyMcaMath/PyMcaSciPy/signal/mediantools.c b/PyMca5/PyMcaMath/PyMcaSciPy/signal/mediantools.c
index 915eaf217..6c030ad0a 100644
--- a/PyMca5/PyMcaMath/PyMcaSciPy/signal/mediantools.c
+++ b/PyMca5/PyMcaMath/PyMcaSciPy/signal/mediantools.c
@@ -40,7 +40,7 @@ DAMAGE.
 /* adding next line may raise errors ...
 #define NPY_NO_DEPRECATED_API NPY_1_7_API_VERSION
 */
-#include "numpy/noprefix.h"
+#include "numpy/arrayobject.h"
 
 #include <setjmp.h>
 
@@ -51,7 +51,7 @@ typedef struct {
 
 typedef struct {
   char *data;
-  intp numels;
+  npy_intp numels;
   int elsize;
   char *zero;        /* Pointer to Representation of zero */
 } Generic_Vector;
@@ -59,9 +59,9 @@ typedef struct {
 typedef struct {
   char *data;
   int  nd;
-  intp  *dimensions;
+  npy_intp  *dimensions;
   int  elsize;
-  intp  *strides;
+  npy_intp  *strides;
   char *zero;         /* Pointer to Representation of zero */
 } Generic_Array;
 
diff --git a/PyMca5/PyMcaPlugins/ImageAlignmentStackPlugin.py b/PyMca5/PyMcaPlugins/ImageAlignmentStackPlugin.py
index 901f42114..eac59a3d0 100644
--- a/PyMca5/PyMcaPlugins/ImageAlignmentStackPlugin.py
+++ b/PyMca5/PyMcaPlugins/ImageAlignmentStackPlugin.py
@@ -1,5 +1,5 @@
 #/*##########################################################################
-# Copyright (C) 2004-2023 European Synchrotron Radiation Facility
+# Copyright (C) 2004-2024 European Synchrotron Radiation Facility
 #
 # This file is part of the PyMca X-ray Fluorescence Toolkit developed at
 # the ESRF.
@@ -32,7 +32,7 @@
 
 This plugin also allows to apply the results from a file.
 """
-__author__ = "V.A. Sole - ESRF Data Analysis"
+__author__ = "V.A. Sole - ESRF"
 __contact__ = "sole@esrf.fr"
 __license__ = "MIT"
 __copyright__ = "European Synchrotron Radiation Facility, Grenoble, France"
@@ -686,8 +686,8 @@ def initializeHDF5File(self, fname):
         nxEntry = hdf.require_group(entryName)
         if 'NX_class' not in nxEntry.attrs:
             nxEntry.attrs['NX_class'] = 'NXentry'.encode('utf-8')
-        nxEntry['title'] = numpy.string_("PyMca saved 3D Array".encode('utf-8'))
-        nxEntry['start_time'] = numpy.string_(ArraySave.getDate().encode('utf-8'))
+        nxEntry['title'] = numpy.bytes_("PyMca saved 3D Array".encode('utf-8'))
+        nxEntry['start_time'] = numpy.bytes_(ArraySave.getDate().encode('utf-8'))
 
         alignmentGroup = nxEntry.require_group('Alignment')
         dataGroup = nxEntry.require_group('Data')
@@ -697,7 +697,7 @@ def initializeHDF5File(self, fname):
     def finishHDF5File(self, hdf):
         #add final date
         toplevelEntry = hdf["entry_000"]
-        toplevelEntry['end_time'] = numpy.string_(ArraySave.getDate().encode('utf-8'))
+        toplevelEntry['end_time'] = numpy.bytes_(ArraySave.getDate().encode('utf-8'))
         hdf.flush()
         hdf.close()